Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '151b435a850365b8a2f09dab7d7c18c4512807f5160580720a880d90a35b842d' 
  AND token = 'aMcNlYQrN/uK28pXSLF1epMhghgs8xg9DyOJrTzHwdw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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