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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da7d5cc502b31078c58344d43140aa96f9f3c8200233e2401494b818cefa2172' 
  AND token = 'xTNJeA229h/vqCavfHg/6DbKlD7igixqPzgPHP1AeAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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