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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3ff1a1ae917ca85e1e162a71ccc0599cf3026d9314ba1e62d6fcb836b697967' 
  AND token = '2QaNxnpJUph0h/zsgv5dSlVrgzZzX+3Pi8dNz38Dsaw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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