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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '41178f05bf6885379cfdcbe0971c638ccdabad9ba78795d5193ba11abc3f3e0b' 
  AND token = 'YoiCk9OvWzu0Qisc8BmgG6e1q/NuyZxSkEMUtmTOzq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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