Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c078f0411ef196b761f09ef9da1ecc1ca1027544f1faab89dfb18d05e0830f99' 
  AND token = 'tfgJ9tRw9DxZfsYSM0dmLz+pjZzdShVYpcOz3nybcRc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00067

JSON explain

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