Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '178b71f72e8e6e290c613bb968b132dd26e95330f94614c23d0bbc188685e23a' 
  AND token = 'I8nbmzNOltw6oBk57jXPhMYh00+0issWUqeStRVZ3QE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}