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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f2d44111b9cd4982b41aed9797f026451419b75c91586c3b6403f5e21c604ae' 
  AND token = 'Fv4RT9kpwLHEaVfbA80X7d+GVtgK5PpcCsbz/MNyvoI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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