Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ee041068edb703006ab39a1265e710918c87924f1d9fd27d6e3bd0eac1682ad' 
  AND token = 'xmBPR+0kqvzEjwkTrImfbfeBtgRpuim+chElTEE+WGk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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