SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0e21f27d005954ce0cc2d98aa51362247bd849fec3288620fb4b82b9d7cb33f' 
  AND token = 'VPGGU5ysKd3JxHCCvEYyjPDGLYMzh2F91LPpl4rBN+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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