Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1ed93179ff24720d728512d520fe412de608cd68ec52b36f19f9b485a9e878d' 
  AND token = 'yeEuqsrkHYKASD+tjCq4E6+Fp+MQP0scHv+hgn6y1sg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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