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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95ce473d9b0fc4d7b3e6b5cb06a058f5c1b9a7e4cd6a771d5b520ba7c1c5288f' 
  AND token = 'Tg0OCm824lYYE5bGx9eicMJzs32A9gUcUrfcRsCXFPo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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