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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f038fe4f463d9c053c95f674b90e8838b9f8f44d4ca03fa1bdce5c0c97467c1d' 
  AND token = 'D2THGFE167cJ4Q54nImSFwdY1Io71JOR5Iua1q526+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}