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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60084f954b8dd3187f397a5f1bd3186d0123eb1233e5e7875f2d24f024793160' 
  AND token = 'MoGLXRSYNs3lhlXG1k9jIjQr5Dw6bkxD3IBgWNOX96M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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