Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c3a18530fca4fe9bee81ce953434c33539d0bae8e60de6173c6ec0ee022a0dcb' 
  AND token = 'nQ/XKT8MtyfMrAWwaCFYEQFhVxaP5motAvO3z8nCk1k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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