Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb50cb12e50eddf0a69db3e416587d86b75e8e8ae9617b9ce627edb2efc1e395' 
  AND token = 'ILt2ZYISP6Mtr4iImLizMUfJqrDOEEtjmjIzR/N+aWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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