Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebf0284214b681f23be26c2f2beb4637c76a1197ce281d4cb2f2b9060c3efb38' 
  AND token = 'Dd1iaKdA8uMCj0J3Mpo1SXUyIgISpapcDWqSrnzSrGs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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