Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '870e9c64d728a49b13070744b3dd2568885d449e5854ffd1c5cc7cd095e81be1' 
  AND token = '/XtkWNjtuvJxtDcfdXoYUHs4Qjf1s+WwLTLk7//kuZs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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