Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '972a63d22db94e99e5c18d0faafd91549e4ef94f1dd745348f3075346bd278cd' 
  AND token = 'M32hlUV6MTTQhfH7z+OoszlyB7MKR+HAVIg/y4t2hG0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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