Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8454944a3e780eac685e504ba62130842b975a77b4ea52fdd7f749df10a2279a' 
  AND token = '/QAzzar80daHhdKQ6JusEa9sXOL9/OeaLaQi+hV8FOQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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