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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e09cf9d293687a70774e41c6bfa06ad418fffe6d72f51c3e0c37cdc864b44122' 
  AND token = 'ilk7qXNZkl0wSk/OW2Y4p/dSFhgitFr5ZZ7S/pWRRwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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