Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f14d022d7362d8e43dde55dd20b4f3b79fd1e6bfaad2ddc317afa4d163490cce' 
  AND token = '627tAwdCi3qUVpyaedKD4UyGwd8zEqh51BtzOpr3X7A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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