Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e34ea2938fa1b4f58c56718f2d0aba06b992cb556ea684fb0a6cb0b236b2e604' 
  AND token = 'w1zZ5bvI6E2Esv74HVwY5d0XOQ/KiBUSyS/Zve0Uiuc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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