Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f42ccd9b59f1f5964422a4e40b6db361ec7fe71d10156b39656676f654bc4dab' 
  AND token = 'jo4nt0AIol4DB0E8a5ZMFevEiHW/nz5pEig+aV7f4xs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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