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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2dd9b66aad7f7a86b41016a082275d81842f4cf99db92de4acf65d0437784818' 
  AND token = '2/0cqPm38DTRkW9D6gQ9fuu5OX2q9ctUetQx1Eye03k=' 
  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"
    }
  }
}