Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1a18191539ab3fe02d02b5ee399d7444a77af94bd5bca25cb41d70f18398302' 
  AND token = 'R7UnEjNnBkPWYM6eVfLnWcgzk4X7g5XXR87bha93lBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}