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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b19d3f848a0de42b7759d07ce15bd863dea6d603ad2ed437dfd3239e3e31460' 
  AND token = 'SvPr7y5dU1EQB/MkNoFWbUJXIDq061DBusvoU4vQMEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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