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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b73461c85794c98f5e4f7441e5002f52161b0668fef8188c8380dd4e2bb14b0' 
  AND token = 'ZLqvgGv+uknnT5p8ExwGjHreMau7UeUeZot0ay97/u4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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