SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10403187a7c25885f7d855c26ddb43d673ca8ba7529bf9b8adf490aac594965f' 
  AND token = 'h0nCwXKp3LhoC1GCiAJ2Y0j2UO2/XHc3TEKUpO1LgP4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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