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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7daf41eb60f5db63d8734a3843a204f6a70b180c1c9e03385b010e767054656' 
  AND token = 'Y8Kh65C3ZVEdBcbaxH9WcJ6T8Z2w53+3hdLgkNHro3s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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