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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '567c6d69c0e3ebc60daab5dac764a8ec4a93405c485153d6dd0f7615c9a8ea6b' 
  AND token = 'a3hbbfGbDH9CPi8b3cZZ+ICIs++DkA08ZwOUFXl3nAA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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