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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae765fad58a1c5d525e1f628ece62c9e7982839dfd497d8c9b0e69bf0e4b353f' 
  AND token = 'HR+y4VxTqL1beM+5Jut2rUzVFNqkgV6MCRXqnlB6kSU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}