Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a15b363dfcb690f9d3628ef114a25ca5f02176b10c775c20a62d2a5e7646e0b' 
  AND token = 'OkPSqa1o98yuTz+HmpqlYpXo21YHzKilmnGdyeXNpUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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