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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '067cbf59d6022269f2b980f010f49a332ec4173e765b49a94d8cfcd186714f1d' 
  AND token = 'Re8nY3ws8pn1LmodxTAFaaHS1Eu0KXH479b9fXDmYRY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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