Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a5cd117dd4d224639f92585426c28dba41e429f70ecb22c67742bb430b0718a' 
  AND token = 'nitPZqF09c9HAEJGyBejqSSFTNt+H0BwkqIvMUHb/ao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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