SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e00183d9f592eeb1d6ba097feccd214ad827f17d3ae8df8865436dbdf6e07bb0' 
  AND token = 'eVP6VPAaUcnC/uKqyvSpro1BU6RFjnIHp/RKginz+C4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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