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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb077319d13f187e68868e5299697d38d9673f39d09b5665f861d2f7b81f6880' 
  AND token = 'Y53/qhK838OL1PPekXCzQr/jrHidCoukkMEVITIN0ic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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