Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '919aab3fd07585c660978e9640e15677d602dab3e79c60a31a5b5067a99ba5e0' 
  AND token = 'qH74K43+z2u3ZGIcV5bbZ0clhFUBbl+vVzccqLma7N0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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