Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85e854e9488a035a721faf2a98fa0cb9e6cb86c6438505962aea99a42b7b2f3d' 
  AND token = 'tu5PJLZY1EtDGfGBmyoPg37bnfY98kyPZ6EOYFb2Gsk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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