Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '997bd9dd82f6d20aabdc2d623302eeb6a626d988e92b8b1ff8f1ff8a134eb1c4' 
  AND token = 'nLx8izAcdKuzyAk4vjpS8t6C89HRgkQ6NcqW76oiBgM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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