SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4ba95c37efefade2c78c1bd8ff169f27606b0283368409c22b5bd57dd00d0714' 
  AND token = 'ZUz9q9CXegEOhdXjI6R9pMqQm+2w/rmJv50JvxGf3kQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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