SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '06e78a56001cf400157b54e979f1bc24599a0c8995cd2cb2812f1163eb876b5d' 
  AND token = 'dwVlQnxb5LpwjIuNKLPQPf28XYSDi+v08pYJoZPEN2E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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