Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc2210550c1da7addecbf94ceea9cc011280e24f46ca707ad899d3719930d6d5' 
  AND token = 'ijS6UcWgC0CK9MF3scqABVb05sIro3v0b2mdEbFXdho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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