Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '018d8b7ed3693f8cee04c5f086171837680913eb73fe8509661e4aef84535783' 
  AND token = 'L1LV+QKSC1Rrai05tuIhCG72h+KSmXgRdftzqWC1UzA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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