Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7984fc31532da342ac2867bda7f43a2b2add4620c8107ac21f362f68be10fa3' 
  AND token = '3le3pMuwszzgAaQRnWDurunsZ+DCPGFPI7XdJAxvAY0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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