Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37453491b5e0be074e7952a5b91ad7044e3461d78d4ba40713d4148305592237' 
  AND token = 'eArE80fZlDribbUg48uexW4mYIgcobE8D+37XZwPmHc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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