Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aef9f5d073c0da1918394245153a0d8f07ea0527a49e87eb18cc53a5f68f6ce2' 
  AND token = 'fcaCzj0xaeUuemzDAKPQVSO+PRjEpGxWrmX2a3gjQnM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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