Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7a7457899410c7838ce2cc5d10f3d8a16197a6603742282a1c41db284a1c1a5' 
  AND token = 'ozU7gkaiUf4pz9tiPBhNdby1A62a5ic7aRFdTRQgDhg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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