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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '799d9ae821e31fc353dd831068d0eaa8fe8ad8575134ccad997c33b7c7091acd' 
  AND token = 'gbRjbiHNYwp489G3F3BTJN5hYPPn7oqjIncBx+1NE/g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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