SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '316474ab3c61366760f83f91124da44fb50e99d6bacd83fcdb757029d1f09f3c' 
  AND token = 'aMJKqzq2f7Ize9zr3MEDhIyEwmPvJV4Xu/Z1sGoAV5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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