Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6ef5bcfc7b57d162e2954ab5273b3098f722cc375bc0bee519771dde930b7f0' 
  AND token = 'PIZ2NEHHJV1i095XyTDKDZAWNJghyLH7xLgt3bx4Bgc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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