Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '87ca51de33c0e60a67b12ca08026a30a3575306d4685cbca7b1171b4a26c682b' 
  AND token = 'JbalQGReK3xpBqKERH+vvBVecsDxolj2pgL9/ghbbD0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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