SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a091f166748979d81cc5402ee3432f998d78991aaf670af15dc8034fb1061d7e' 
  AND token = 'Pjwf/gR4YX21HhG6v+9HkXuvhq1YVa7tAx+fzok2pvk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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