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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b209c49c0cc85ed8819caf95531d6d729713353ee8960b767246106b21d93d71' 
  AND token = 'sV1LvMoJEUhs9VmVgtsUgUaIevg0exN52sGP8JuGnPk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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