Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70315204d97620a69abc2cdbf34c99dcb5c6c015de6164c239f6030dec48078f' 
  AND token = 'pzrxmYPZ7dkQCHAmnIzv3GRrOZsECGoBwdwfZmwWKPo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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