Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44371df6067cd5afdc640927261f51d510a8dc0043c9a77c49d593547b8efeea' 
  AND token = 'GJrj7RY6PbIV0SVDIQ2ynQwUz1xu3+LG3FGT+Fi5AFQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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