Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f695a2152941fe6dc36a809ebaaf436d6c90023464f758dbf25a38b95be75dd9' 
  AND token = '8UH2TpTHOeNOb4AC1sIeJSNEhzu0q84O1oDDAhdAedk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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