Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2ebde74a3af91506c1e8a44dbbd5ce38b06f9acd4d6367db7ff9aface7cdc49' 
  AND token = 'SOCULyJlVqsfb84y5VZgs8y3nAXBrEzyQnGb375kXBE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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