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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7368c4e7d2f2f5844890adec0dde0dd2db7985a9b1c0f293ef691c27acb7cd4' 
  AND token = 'nrPfEJOibU8k7xeEy6R1b4LYglinj3LdNtuqF8CDYN8=' 
  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"
    }
  }
}