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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7ba016f59e8f3efff27c3ebb4cf5f576f3324ffaafdc2a6ae0bbe5ac338c0f3' 
  AND token = 'WuYoBG9OmrV1kBLq1s1Yj7seja1hCBDi6s4hHXUYuS0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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