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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3142604e6811254731ec6b43423e4ae87b4d834947d27a63263f48c2946f6b8c' 
  AND token = 'axBVIX5j87tiFh8h1VYJEdpJz3jjhUAn48OSQNZodFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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