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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c07fb2c9ce413c930cc9e61df9e970cb7fc4f977b606c120ed62db08cc1e7c6' 
  AND token = 'B6ozdfhPcjeVw2LcqcdV06AJeV0XCFJFfaBZxtfxlFw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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