Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d8093d95ea7bc234b40da9aba0b6fe2c3d6ac62cdc803002caabd0c87f470cd' 
  AND token = '6RBcEjr1qGlK4Fo499xyygu7JBVTcD/ENB250bhj4lg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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