Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b728d817e5d3d3d5e690448de2ccf728f6cb031e87dcae49a86c0b1d708bf226' 
  AND token = 'EQarmHcXKk6VqODhrXb0DR/6i1+YY5wv22TZ1GcQJN4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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