Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99eafc304565bf9cf5bed69ed1757926a3f80f2a83c4732fcae1516f4247aa21' 
  AND token = '59ih3iG3wnT5tsQbR21ue5ju+GJWjlTRmmWMzK7HO3o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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