Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5ccdeaa0d8a21bd37a2255088fbe8b338385173c8ff9489385d4850945c1e8d' 
  AND token = 'dD4nAM0PzX5ozxYRLG4A8briADXA6yNlDroooFumJGE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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